This comes as aging sirens have failed recently, including 18 during a test earlier this month. Thirteen sirens failed during a tsunami warning in October.

The Hawaii Tribune-Herald reports as many as 10 sirens considered "top priority" may be upgraded or installed by the end of the end of the year. County Civil Defense Administrator Darryl Oliveira says proposed locations include Puna, Kona, South Kohala and Hilo.

The state is working to modernize the emergency warning system across the islands. A new activation system will rely on cellular and satellite networks instead of radio transmissions.

To ensure that the sirens that failed during this month's test are working, another test on Tuesday was scheduled for the Big Island.

Israeli Prime Minister Benjamin Netanyahu warned Tuesday that a proposed agreement between world powers and Iran was "a bad deal" that would not stop Tehran from getting nuclear weapons -- but would rather pave its way to getting lots of them and lea...